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Simulation of the spray drying of single granules: The correlation between microscopic forces and granule morphology

: Breinlinger, T.; Hashibon, A.; Kraft, T.

Volltext urn:nbn:de:0011-n-3519910 (3.6 MByte PDF)
MD5 Fingerprint: 934ececcba107585e8d3ada036d19ee9
Erstellt am: 3.5.2016

Journal of the American Ceramic Society 98 (2015), Nr.6, S.1778-1786
ISSN: 0002-7820
European Commission EC
Deutsche Forschungsgemeinschaft DFG
WO 1667/1-1
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IWM ()
spray drying; CFD-DEM simulation; granule morphology

In the ceramic industry, spray drying is an important process transforming fine primary powder into processable granular material. Granule formation at spray drying has been investigated in the past and plausible explanatory models have been established for the governing mechanisms of granule formation. In this study, we use numerical modeling via coupled discrete element method and computational fluid dynamics simulations to investigate this formation process. The focus lies on the evolution of the granule morphology during drying of single droplets. In addition to a demonstration, that the simulation results support the propositions made by the experimentally-based models, a new correlation was found which leads to an extension of those models for granule formation in terms of the granule stability.